--- title: "66 vs JTo: preflop equity" url: "https://georgelipoker.com/equity/66-vs-jto.md" canonical_url: "https://georgelipoker.com/equity/66-vs-jto" last_updated: "2026-10-23" type: "reference" summary: "66 vs JTo is close to a coin flip before the flop: 50.25% to 49.75% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-t9s.md", "https://georgelipoker.com/equity/66-vs-33.md", "https://georgelipoker.com/equity/a9s-vs-jto.md"] --- # 66 vs JTo: preflop equity 66 vs JTo is close to a coin flip before the flop: 50.25% to 49.75% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, 66 takes 50.25% of the pot on average and JTo takes the other 49.75%. ## 66 against JTo: the numbers **Exact preflop results for 66 against JTo, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 49.947 | 0.603 | 49.450 | 50.248 | | JTo | 49.450 | 0.603 | 49.947 | 49.752 | 66 and JTo are a pocket pair and an offsuit hand, in that order. This is a pair against two overcards, a matchup that stays close because the other hand only needs one of its ranks to appear. 66 leads by less than 1 points of equity, so the result of any one deal is close to a toss-up. Split pots make up 0.60% of the boards, and both equity figures count them as half a win each. In the ranking of all 169 starting hands, 66 is number 17 and JTo is number 57. **Boards behind the percentages: 123,285,888 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 61,578,000 | 743,000 | 60,965,000 | | JTo | 60,965,000 | 743,000 | 61,578,000 | Exact total: 72 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate. **66 against JTo read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | 66 | 1.010 | 2.002 | 2.022 | 0.990 | | JTo | 0.990 | 2.022 | 2.002 | 1.010 | In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity. ## Who is ahead on which flops The flop changes the picture. 66 does best on low rainbow flops (nine high or lower), at 72.62%, and worst on rainbow flops topped by a ten or better, at 43.31%. The lead reverses on rainbow flops topped by a ten or better, two-tone flops and monotone flops: there JTo is the favorite even though 66 is ahead overall. **66 against JTo by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | JTo wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.717 | 43.138 | 0.335 | 56.527 | 43.306 | | Rainbow, nine or lower | 6.314 | 72.348 | 0.553 | 27.099 | 72.624 | | Two-tone | 46.485 | 48.935 | 0.368 | 50.697 | 49.119 | | Monotone | 5.151 | 46.926 | 1.824 | 51.250 | 47.838 | | Paired | 17.333 | 55.106 | 1.272 | 43.622 | 55.742 | A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank. ## Compared with a random hand Compared with a random opponent, this matchup shifts 66 from 63.29% by -13.04 points and JTo from 55.25% by -5.50 points. **66 and JTo here compared with each against a random hand, in percent** | Case | Equity here | Against a random hand | Change in points | Times the random-hand equity | | --- | --- | --- | --- | --- | | 66, all flops | 50.248 | 63.285 | -13.037 | 0.79400 | | 66, rainbow, ten or higher | 43.306 | 63.285 | -19.979 | 0.68430 | | 66, rainbow, nine or lower | 72.624 | 63.285 | +9.339 | 1.14757 | | 66, two-tone | 49.119 | 63.285 | -14.166 | 0.77616 | | 66, monotone | 47.838 | 63.285 | -15.447 | 0.75591 | | 66, paired | 55.742 | 63.285 | -7.543 | 0.88081 | | JTo, all flops | 49.752 | 55.248 | -5.496 | 0.90052 | | JTo, rainbow, ten or higher | 56.694 | 55.248 | +1.446 | 1.02617 | | JTo, rainbow, nine or lower | 27.376 | 55.248 | -27.872 | 0.49551 | | JTo, two-tone | 50.881 | 55.248 | -4.367 | 0.92096 | | JTo, monotone | 52.162 | 55.248 | -3.086 | 0.94414 | | JTo, paired | 44.258 | 55.248 | -10.990 | 0.80108 | ## Does a shared suit matter? Two kinds of deal exist here. In 60 of them the hands share a suit and 66 holds 50.15%. In 12 they do not, and it holds 50.72%. 66 does better with no shared suit, by 0.57 points. **66 against JTo by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | JTo wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 60 | 83.33 | 49.845 | 0.619 | 49.536 | 50.154 | | No shared suit | 12 | 16.67 | 50.455 | 0.526 | 49.019 | 50.718 | ## How often this matchup comes up How often does it happen? 72 of the 1,624,350 ordered deals (0.0044%) are 66 against JTo, and 144 (0.0089%) if either hand may sit in either seat. ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. 66 averages $100.50 from the $200, up $0.50; JTo averages $99.50, down $0.50. In 1,000 deals of exactly this matchup, expect about 499 won outright by 66, about 495 won outright by JTo and about 6 split. ## The same matchup from the other side The reversed view, JTo against 66, shows 49.75% for JTo and 50.25% for 66. It is the same count, so it redirects here. ## Keep exploring 6s6h against JdTc is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength. - [Open 6s6h against JdTc in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=JdTc) - [66 combos](https://georgelipoker.com/combos/66.md) - [JTo combos](https://georgelipoker.com/combos/jto.md) - [66 vs T9s](https://georgelipoker.com/equity/66-vs-t9s.md) - [66 vs 33](https://georgelipoker.com/equity/66-vs-33.md) - [A9s vs JTo](https://georgelipoker.com/equity/a9s-vs-jto.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The page is built from a full enumeration: 1,712,304 boards, every suit pattern of the 72 specific deals, both seven-card hands evaluated. A tie is worth half a win to each hand, and a board is tallied under each of its ten possible flops for the texture rows. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [66 vs T9s: preflop equity](https://georgelipoker.com/equity/66-vs-t9s.md) - [66 vs 33: preflop equity](https://georgelipoker.com/equity/66-vs-33.md) - [A9s vs JTo: preflop equity](https://georgelipoker.com/equity/a9s-vs-jto.md)